Maracaibo vs metropolis

Maracaibo and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Maracaibo	Yes	No	No	No
metropolis	Yes	No	No	No

Maracaibo (noun)	metropolis (noun)
a port city in northwestern Venezuela; a major oil center	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts